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  • 10:08 Ideal Gas Equation Example 1

    Ideal Gas Equation Example 1

    / 168 views

    Figuring out the number of moles of gas we have using the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=erjMiErRgSQ

  • 09:22 Ideal Gas Equation: PV=nRT

    Ideal Gas Equation: PV=nRT

    / 190 views

    Intuition behind the ideal gas equation: PV=nRT. More free lessons at: http://www.khanacademy.org/video?v=WScwPIPqZa0

  • 15:04 Stoichiometry: Limiting Reagent

    Stoichiometry: Limiting Reagent

    / 140 views

    Stoichiometry problem where we have a limiting reagent! More free lessons at: http://www.khanacademy.org/video?v=rESzyhPOJ7I

  • 09:56 Stoichiometry

    Stoichiometry

    / 175 views

    Introduction to stoichiometry More free lessons at: http://www.khanacademy.org/video?v=SjQG3rKSZUQ

  • 14:28 Balancing Chemical Equations

    Balancing Chemical Equations

    / 173 views

    The art of balancing equations in chemistry! More free lessons at: http://www.khanacademy.org/video?v=RnGu3xO2h74

  • 06:41 Another mass composition problem

    Another mass composition problem

    / 148 views

    Another exercise converting a mass composition to an empirical formula. More free lessons at: http://www.khanacademy.org/video?v=sXOIIEZh6qg

  • 12:58 Formula from Mass Composition

    Formula from Mass Composition

    / 162 views

    Figuring out the empirical formula from a molecules mass composition

  • 09:44 The Mole and Avogadro's Number

    The Mole and Avogadro's Number

    / 187 views

    Introduction to the idea of a mole as a number (vs. an animal) More free lessons at: http://www.khanacademy.org/video?v=AsqEkF7hcII

  • 15:54 Molecular and Empirical Formulas

    Molecular and Empirical Formulas

    / 164 views

    Introduction to molecular and empirical formulas. Calculating molecular mass. More free lessons at: http://www.khanacademy.org/video?v=gfBcM3uvWfs

  • 13:22 Ionic, Covalent, and Metallic Bonds

    Ionic, Covalent, and Metallic Bonds

    / 167 views

    Introduction to ionic, covalent, polar covalent and metallic bonds. More free lessons at: http://www.khanacademy.org/video?v=CGA8sRwqIFg

  • 15:39 Other Periodic Table Trends

    Other Periodic Table Trends

    / 161 views

    Electronegativity, metallic nature and atomic radius.

  • 12:13 Periodic Table Trends: Ionization Energy

    Periodic Table Trends: Ionization Energy

    / 175 views

    What an ion is. Using the periodic table to understand how difficult it is to ionize an atom. More free lessons at: http://www.khanacademy.org/video?v=ywqg9PorTAw

  • 11:51 Groups of the Periodic Table

    Groups of the Periodic Table

    / 185 views

    Properties of alkali, alkaline earth and transition metals. Halogens and noble gases. More free lessons at: http://www.khanacademy.org/video?v=LDHg7Vgzses

  • 15:23 Valence Electrons

    Valence Electrons

    / 115 views

    Looking at valence electrons to figure out reactivity More free lessons at: http://www.khanacademy.org/video?v=1TZA171yxY4

  • 10:18 Electron Configurations 2

    Electron Configurations 2

    / 149 views

    Figuring out configurations for the d-block elements More free lessons at: http://www.khanacademy.org/video?v=YURReI6OJsg

  • 10:05 Electron Configurations

    Electron Configurations

    / 169 views

    Introduction to using the periodic table to determine electron configurations

  • 14:31 More on orbitals and electron configuration

    More on orbitals and electron configuration

    / 134 views

    More intuition on orbitals. Touching on electron configuration. More free lessons at: http://www.khanacademy.org/video?v=FmQoSenbtnU

  • 13:38 Orbitals

    Orbitals

    / 123 views

    An introduction to orbitals More free lessons at: http://www.khanacademy.org/video?v=yBrp8uvNAhI

  • 21:05 Introduction to the atom

    Introduction to the atom

    / 162 views

    The atom, proton, neutron and electron More free lessons at: http://www.khanacademy.org/video?v=1xSQlwWGT8M

  • 12:41 Taxonomy and the Tree of Life

    Taxonomy and the Tree of Life

    / 222 views

    The science of taxonomy and where humans fit into the tree of life More free lessons at: http://www.khanacademy.org/video?v=oHvLlS_Sc54

  • 08:49 Species

    Species

    / 194 views

    What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs More free lessons at: http://www.khanacademy.org/video?v=Tmt4zrDK3dA

  • 14:13 Secondary Active Transport in the Nephron

    Secondary Active Transport in the Nephron

    / 147 views

    Secondary Active Transport in the Nephron More free lessons at: http://www.khanacademy.org/video?v=czY5nyvZ7cU

  • 14:35 Inflammatory Response

    Inflammatory Response

    / 151 views

    Overview of the inflammatory response More free lessons at: http://www.khanacademy.org/video?v=FXSuEIMrPQk

  • 11:07 Review of B cells,  CD4+ T cells and CD8+ T cells

    Review of B cells, CD4+ T cells and CD8+ T cells

    / 196 views

    Review of B cells, CD4+ T cells and CD8+ T cells More free lessons at: http://www.khanacademy.org/video?v=xaz5ftvZCyI

  • 10:07 Cytotoxic T Cells

    Cytotoxic T Cells

    / 156 views

    How cytotoxic T cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells More free lessons at: http://www.khanacademy.org/video?v=oqI4skjr6lQ

  • 20:34 Helper T Cells

    Helper T Cells

    / 176 views

    Introduction to helper T cells and their role in activating B cells More free lessons at: http://www.khanacademy.org/video?v=uwMYpTYsNZM

  • 11:33 Professional Antigen Presenting Cells (APC) and MHC II complexes

    Professional Antigen Presenting Cells (APC) and MHC II complexes

    / 204 views

    How professional antigen presenting cells present parts of engulfed pathogens on MHC II complexes (major histocompatibility complexes). More free lessons at: http://www.khanacademy.org/video?v=j_kSmmEpvQk

  • 14:13 B Lymphocytes (B cells)

    B Lymphocytes (B cells)

    / 200 views

    Overview of B cells (B lymphocytes) and how they are activated and produce antibodies More free lessons at: http://www.khanacademy.org/video?v=Z36dUduOk1Y

  • 08:07 Types of immune responses: Innate and Adaptive.  Humoral vs. Cell-Mediated

    Types of immune responses: Innate and Adaptive. Humoral vs. Cell-Mediated

    / 216 views

    Overview of types of immune responses. Difference between innate and adaptive immunity. Differences between humoral adaptive immunity and cell-mediated adaptive immunity. More free lessons at: http://www.khanacademy.org/video?v=rp7T4IItbtM

  • 16:20 Role of Phagocytes in Innate or Nonspecific Immunity

    Role of Phagocytes in Innate or Nonspecific Immunity

    / 194 views

    Role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. MHC II. More free lessons at: http://www.khanacademy.org/video?v=O1N2rENXq_Y

  • 16:32 Anatomy of a muscle cell

    Anatomy of a muscle cell

    / 194 views

    Understanding the structure of a muscle cell More free lessons at: http://www.khanacademy.org/video?v=uY2ZOsCnXIA

  • 14:43 Role of the Sarcoplasmic Reticulum in Muscle Cells

    Role of the Sarcoplasmic Reticulum in Muscle Cells

    / 573 views

    The role of the sarcoplasmic reticulum in controlling calcium ion concentrations within the muscle cell More free lessons at: http://www.khanacademy.org/video?v=SauhB2fYQkM

    Featured
  • 09:22 Tropomyosin and troponin and their role in regulating muscle contraction

    Tropomyosin and troponin and their role in regulating muscle contraction

    / 200 views

    Tropomyosin and troponin and their role in regulating muscle contraction. How calcium ion concentration dictates whether a muscle is contracting or not. More free lessons at: http://www.khanacademy.org/video?v=LiOfeSsjrB8

  • 09:38 Myosin and Actin

    Myosin and Actin

    / 159 views

    How myosin and actin interact to produce mechanical force. More free lessons at: http://www.khanacademy.org/video?v=zopoN2i7ALQ

  • 15:54 Neuronal Synapses (Chemical)

    Neuronal Synapses (Chemical)

    / 175 views

    How one neuron can stimulate (or inhibit) another neuron at a chemical synapse More free lessons at: http://www.khanacademy.org/video?v=Tbq-KZaXiL4

  • 18:53 Electrotonic and Action Potentials

    Electrotonic and Action Potentials

    / 172 views

    How electrotonic and action potentials propagate down cells

  • 06:48 Correction to Sodium and Potassium Pump Video

    Correction to Sodium and Potassium Pump Video

    / 211 views

    Correction to Sodium and Potassium Pump Video More free lessons at: http://www.khanacademy.org/video?v=ye3rTjLCvAU

  • 13:53 Sodium Potassium Pump

    Sodium Potassium Pump

    / 158 views

    How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane More free lessons at: http://www.khanacademy.org/video?v=C_H-ONQFjpQ

  • 06:13 Anatomy of a Neuron

    Anatomy of a Neuron

    / 355 views

    Introduction to the neuron and its anatomy More free lessons at: http://www.khanacademy.org/video?v=ob5U8zPbAX4

  • 14:34 Hemoglobin

    Hemoglobin

    / 178 views

    Hemoglobin and its role in the circulatory system More free lessons at: http://www.khanacademy.org/video?v=LWtXthfG9_M

  • 14:57 Circulatory System and the Heart

    Circulatory System and the Heart

    / 315 views

    Introduction to the circulatory system and the heart More free lessons at: http://www.khanacademy.org/video?v=QhiVnFvshZg

  • 16:30 Red blood cells

    Red blood cells

    / 211 views

    Oxygen uptake by hemoglobin in red blood cells More free lessons at: http://www.khanacademy.org/video?v=fLKOBQ6cZHA

  • 20:33 The Lungs and Pulmonary System

    The Lungs and Pulmonary System

    / 185 views

    The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm More free lessons at: http://www.khanacademy.org/video?v=SPGRkexI_cs

  • 21:04 Parts of a cell

    Parts of a cell

    / 160 views

    Parts of a cell: nucleus, ribosomes, endoplasmic reticulum, Golgi bodies, mitochondria, chloroplasts, vacuoles, and vesicles

  • 08:37 CAM Plants

    CAM Plants

    / 177 views

    How CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day More free lessons at: http://www.khanacademy.org/video?v=xp6Zj24h8uA

  • 16:58 C-4 Photosynthesis

    C-4 Photosynthesis

    / 224 views

    C-4 Photosynthesis: How some plants avoid photorespiration More free lessons at: http://www.khanacademy.org/video?v=7ynX_F-SwNY

  • 17:03 Popular Photorespiration

    Photorespiration

    / 1,689 views

    More detail on the Calvin Cycle and Photorespiration More free lessons at: http://www.khanacademy.org/video?v=EQvTEFCANTM

  • 13:28 Photosynthesis:  Calvin Cycle

    Photosynthesis: Calvin Cycle

    / 200 views

    The Calvin Cycle or the light-independent (dark) reactions of photosythesis More free lessons at: http://www.khanacademy.org/video?v=slm6D2VEXYs

  • 18:51 Photosynthesis:  Light Reactions and Photophosphorylation

    Photosynthesis: Light Reactions and Photophosphorylation

    / 188 views

    More detail on the light reactions and photophorylation More free lessons at: http://www.khanacademy.org/video?v=yfR36PMWegg

  • 20:16 Photosynthesis: Light Reactions 1

    Photosynthesis: Light Reactions 1

    / 190 views

    Details on the light-dependent reactions of photosynthesis More free lessons at: http://www.khanacademy.org/video?v=GR2GA7chA_c

  • 13:38 Photosynthesis

    Photosynthesis

    / 212 views

    Overview of photosythesis More free lessons at: http://www.khanacademy.org/video?v=-rsYk4eCKnA

  • 04:59 Oxidative Phosphorylation and Chemiosmosis

    Oxidative Phosphorylation and Chemiosmosis

    / 170 views

    Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video) More free lessons at: http://www.khanacademy.org/video?v=W_Q17tqw_7A

  • 17:16 Electron Transport Chain

    Electron Transport Chain

    / 186 views

    Overview of the Electron Transport Chain More free lessons at: http://www.khanacademy.org/video?v=mfgCcFXUZRk

  • 17:47 Krebs / Citric Acid Cycle

    Krebs / Citric Acid Cycle

    / 185 views

    Overview of the Krebs or Citric Acid Cycle More free lessons at: http://www.khanacademy.org/video?v=juM2ROSLWfw

  • 13:30 Glycolysis

    Glycolysis

    / 150 views

    Overview of glycolysis More free lessons at: http://www.khanacademy.org/video?v=FE2jfTXAJHg

  • 17:08 Oxidation and Reduction in Cellular Respiration

    Oxidation and Reduction in Cellular Respiration

    / 156 views

    Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction. More free lessons at: http://www.khanacademy.org/video?v=_KyyVhlUDNU

  • 13:29 Oxidation and Reduction Review From Biological Point-of-View

    Oxidation and Reduction Review From Biological Point-of-View

    / 158 views

    Taking a looking at oxidation and reduction in a biological context More free lessons at: http://www.khanacademy.org/video?v=orI2m6IarJg

  • 14:19 Introduction to Cellular Respiration

    Introduction to Cellular Respiration

    / 168 views

    Introduction to cellular respiration, glycolysis, the Kreb's Cycle, and the electron transport chain

  • 13:35 ATP: Adenosine Triphosphate

    ATP: Adenosine Triphosphate

    / 320 views

    Introduction to ATP or Adenosine Triphosphate

  • 23:17 Viruses

    Viruses

    / 140 views

    Introduction to viruses More free lessons at: http://www.khanacademy.org/video?v=0h5Jd7sgQWY

  • 18:27 Bacteria

    Bacteria

    / 195 views

    Introduction to bacteria More free lessons at: http://www.khanacademy.org/video?v=TDoGrbpJJ14

  • 14:19 Sex-Linked Traits

    Sex-Linked Traits

    / 391 views

    Chromosomal basis for gender. Sex-linked traits. More free lessons at: http://www.khanacademy.org/video?v=-ROhfKyxgCo

  • 14:57 Hardy-Weinberg Principle

    Hardy-Weinberg Principle

    / 182 views

    Understanding allele and genotype frequency in population in Hardy-Weinberg Equilibrium.

  • 25:16 Punnett Square Fun

    Punnett Square Fun

    / 207 views

    Dihybrid crosses. Independent assortment. Incomplete dominance. Codominance and multiple alleles. More free lessons at: http://www.khanacademy.org/video?v=D5ymMYcLtv0

  • 17:27 Introduction to Heredity

    Introduction to Heredity

    / 169 views

    Heredity and Classical Genetics. Dominant and recessive traits. Heterozygous and homozygous genotypes. More free lessons at: http://www.khanacademy.org/video?v=eEUvRrhmcxM

  • 12:36 Cancer

    Cancer

    / 299 views

    An introduction to what cancer is and how it is the by-product of broken DNA replication More free lessons at: http://www.khanacademy.org/video?v=RZhL7LDPk8w

  • 19:55 Embryonic Stem Cells

    Embryonic Stem Cells

    / 178 views

    An overview of early development of a zygote to an embryo. Embryonic and somatic stem cells. More free lessons at: http://www.khanacademy.org/video?v=-yCIMk1x0Pk

  • 27:23 Phases of Meiosis

    Phases of Meiosis

    / 192 views

    The phases of Meiosis. More free lessons at: http://www.khanacademy.org/video?v=ijLc52LmFQg

  • 20:42 Phases of Mitosis

    Phases of Mitosis

    / 157 views

    Explanation of the phases of mitosis. More free lessons at: http://www.khanacademy.org/video?v=LLKX_4DHE3I

  • 18:24 Mitosis, Meiosis and Sexual Reproduction

    Mitosis, Meiosis and Sexual Reproduction

    / 176 views

    Mitosis, meiosis and sexual reproduction. Understanding gametes, zygotes, and haploid / diploid numbers.

  • 18:23 Chromosomes, Chromatids, Chromatin, etc.

    Chromosomes, Chromatids, Chromatin, etc.

    / 172 views

    The vocabulary of DNA: chromosomes, chromatids, chromatin, transcription, translation, and replication More free lessons at: http://www.khanacademy.org/video?v=s9HPNwXd9fk

  • 19:52 Variation in a Species

    Variation in a Species

    / 158 views

    How variation can be introduced into a species. More free lessons at: http://www.khanacademy.org/video?v=DuArVnT1i-E

  • 28:06 DNA

    DNA

    / 176 views

    An introduction to DNA More free lessons at: http://www.khanacademy.org/video?v=_-vZ_g7K6P0

  • 13:29 Natural Selection and the Owl Butterfly

    Natural Selection and the Owl Butterfly

    / 221 views

    How the "Owl Butterfly" may have gotten the spot on its wings. More free lessons at: http://www.khanacademy.org/video?v=dR_BFmDMRaI

  • 09:01 Evolution Clarification

    Evolution Clarification

    / 177 views

    Clarifying some points on evolution and intelligent design More free lessons at: http://www.khanacademy.org/video?v=nh1R-gyY7es

  • 11:36 Intelligent Design and Evolution

    Intelligent Design and Evolution

    / 184 views

    The argument that evolution speaks to being the most "intelligent design" More free lessons at: http://www.khanacademy.org/video?v=qxOEz9aPZNY

  • 01:04 Ape Clarification

    Ape Clarification

    / 142 views

    Ape Clarification - that they have no tails More free lessons at: http://www.khanacademy.org/video?v=oFGkYA_diDA

  • 17:39 Introduction to Evolution and Natural Selection

    Introduction to Evolution and Natural Selection

    / 181 views

    Introduction to evolution, variation in a population and natural selection More free lessons at: http://www.khanacademy.org/video?v=GcjgWov7mTM

  • 12:09 Surveys and Samples

    Surveys and Samples

    / 212 views

    Surveys and Samples

  • 09:58 Two more examples of solving rational equations

    Two more examples of solving rational equations

    / 229 views

    Two more examples of solving rational equations

  • 12:57 Solving Rational Equations

    Solving Rational Equations

    / 190 views

    Solving Rational Equations

  • 06:24 Adding Rational Expressions Example 3

    Adding Rational Expressions Example 3

    / 214 views

    Adding Rational Expressions Example 3

  • 06:40 Adding Rational Expressions Example 2

    Adding Rational Expressions Example 2

    / 241 views

    Adding Rational Expressions Example 2

  • 03:47 Adding Rational Expressions Example 1

    Adding Rational Expressions Example 1

    / 234 views

    Adding Rational Expressions Example 1

  • 09:19 Multiplying and Dividing Rational Expressions

    Multiplying and Dividing Rational Expressions

    / 208 views

    Multiplying and Dividing Rational Expressions

  • 15:23 Simplifying Rational Expressions Introduction

    Simplifying Rational Expressions Introduction

    / 200 views

    Simplifying Rational Expressions More free lessons at: http://www.khanacademy.org/video?v=7Uos1ED3KHI

  • 12:09 Polynomial Division

    Polynomial Division

    / 221 views

    Polynomial Division More free lessons at: http://www.khanacademy.org/video?v=FXgV9ySNusc

  • 11:31 A Third Example of Graphing a Rational Function

    A Third Example of Graphing a Rational Function

    / 210 views

    A Third Example of Graphing a Rational Function More free lessons at: http://www.khanacademy.org/video?v=p7ycTWq6BFk

  • 08:20 Another Rational Function Graph Example

    Another Rational Function Graph Example

    / 215 views

    Another Rational Function Graph Example More free lessons at: http://www.khanacademy.org/video?v=ReEMqdZEEX0

  • 21:06 Asymptotes of Rational Functions

    Asymptotes of Rational Functions

    / 214 views

    Asymptotes of Rational Functions More free lessons at: http://www.khanacademy.org/video?v=2N62v_63SBo

  • 17:03 Proportionality

    Proportionality

    / 210 views

    Proportionality

  • 13:14 Box-and-whisker Plot

    Box-and-whisker Plot

    / 311 views

    Box-and-whisker Plot

  • 06:08 Histograms

    Histograms

    / 286 views

    Histograms More free lessons at: http://www.khanacademy.org/video?v=4eLJGG2Ad30

  • 06:45 Stem and Leaf Plots

    Stem and Leaf Plots

    / 234 views

    Stem and Leaf Plots

  • 12:34 Range, Variance and Standard Deviation as Measures of Dispersion

    Range, Variance and Standard Deviation as Measures of Dispersion

    / 251 views

    Range, Variance and Standard Deviation as Measures of Dispersion More free lessons at: http://www.khanacademy.org/video?v=E4HAYd0QnRc

  • 09:01 Average or Central Tendency: Arithmetic Mean, Median, and Mode

    Average or Central Tendency: Arithmetic Mean, Median, and Mode

    / 295 views

    Average or Central Tendency: Arithmetic Mean, Median, and Mode

  • 08:50 Visual Pythagorean Theorem Proof

    Visual Pythagorean Theorem Proof

    / 280 views

    Visual Pythagorean Theorem Proof - some basic geometry required

  • 06:41 Midpoint Formula

    Midpoint Formula

    / 246 views

    Midpoint Formula More free lessons at: http://www.khanacademy.org/video?v=Ez_-RwV9WVo

  • 09:39 Distance Formula

    Distance Formula

    / 244 views

    How to find the distance between lines using the Pythagorean Formula More free lessons at: http://www.khanacademy.org/video?v=nyZuite17Pc

  • 13:03 Pythagorean Theorem

    Pythagorean Theorem

    / 280 views

    Pythagorean Theorem More free lessons at: http://www.khanacademy.org/video?v=AEIzy1kNRqo

  • 11:54 More Involved Radical Equation Example

    More Involved Radical Equation Example

    / 194 views

    More Involved Radical Equation Example

  • 05:16 Radical Equation Examples

    Radical Equation Examples

    / 219 views

    Radical Equation Examples

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